Home / 20,442.17-28,209.41-11,490.05

Finding the Fourth Proportional to 20,442.17, 28,209.41 and 11,490.05

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Solution

The fourth proportional to 20,442.17, 28,209.41 and 11,490.05 is: 15,855.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.17 : 28,209.41 = 11,490.05 : x
  2. Step 2: Convert to fraction form
    20,442.17/28,209.41 = 11,490.05/x
  3. Step 3: Cross multiply
    20,442.17x = 28,209.41 × 11,490.05
  4. Step 4: Simplify right side
    20,442.17x = 324,127,652.16
  5. Step 5: Solve for x
    x = 324,127,652.16/20,442.17
  6. Step 6: Final answer
    x = 15,855.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.